Centrifugal separator for milk and other fluids.



P. T. SUNDBERG. v CENTBIFUGAL SEPABATOB FOB MILK AND OTHER FLUIDS.

APPLICATION FILED FEB. 7, 1910. Patented June 6, 1911.

10 fluids and it refers especiall UNITED STATES PATENT OFFICE;

PER TEODOR SUNDBERG, OF 'S'IOCKHOLM, SWEDEN, ASSIGNOR TO AKTIEBOLAGET EXPRESSSEPARATOR EMIL G. LIND & (30., F STOCKHOLM, SWEDEN.

GENTRIFUGAL 'SEPARATOR FOR MILK ANb OTHER FLUIDS.

Specification of Letters Patent. P t nt d June 6, 1911.

Application filed February 7, 1910; Serial No. 542,551.

Sweden, have invented a new and useful Centrifugal Cream-leparator, of which the following is a specification.

My il'ivention'rclates to improvements in centrifugal separators for milk and other to that kind 'of separators where the bow has a tubular shaft or center with longitudinal ribs and ports insaid ribs through which the whole milk is fed, and a liner of superimposed l5 conical plates passed on said shaft and pro vided with slots in their 'inner edge so as to form vertical channels. Andthe object of my invention is to facilitate the separation and to render it as perfectand quick as possible and to. attain such result with a simple, cheap and durable construction of the apparatus.-

Heretoforc the liner had such a position on the shaft that the ribs entered the slots in the plates and filled them either totally or partly. The latter form is shown in my previous Patent No. 847,524. I have now found that it is better to arrange the liner in such a position that the ribs do not enter" the slots and even do not lie in the same radial vertical plane as the channels formed by said slots but alternate'with them. I do not pretend to be able to fully account for why this new arrangement must give a better result, but it may be supposed that the vertical channels Whcnleft free and not partly or totally filled up by the ribs or by the whole milk rushing down from the radial port formed in upper part of the ribs, willcsscntially facilitate theinwardand upward movement of the separated rream and at thesame time an even and uniform distribution ofthe whole milk upon the liner, especially if the ribs be provided with ,45 a longitudinal groove on their edge in front of the inner edge of the plates so that the milk when leaving the port can flow down into said groove and be partly distributed therefrom into the spaces between the plates while the part of the whole milk which N reaeheslthe bottom of the bowl. can by flowribs.

shows the preferred form of my new machine Figure 1 is a horizontal section on lineB-Jl, Fig. 2, after removal of the nut, cover 10 and cover plate 8. Fig. .2 is a vertical section on line AA, Fig. 1.

1 is the conical plates with slots 2 at their inner edge. These slots lie above one another so that vertical channels 3 are formed in the liner. The vertical ribs 4 on the shaftor center are placed between said channels 3 and two of them have each a, longitudinal groove 7 on their edge extending from bottom of the bowl to. the port 5 formed in upper part of the ribs and serv-,

ing as a eommunication between the central feeding chamber 6 and the bowl.

The ribs 4 reach the inner edgeof the plates and serve as guides for the latter.

The third rib has no groove but a. smaller rib 12 on its edge, entering a corresponding notch orjsmall slot in the-plates,'so asto render it impossible to pass the'plates on the tubular shaft in a wrongn1utual-posi .tion.

8 is the cover plate, 9 'is the outlet for cream, 10 is the cover and 11 the outlet for skim milk.

As well known the skim milk, being the heavier part of the milk, is forced. to the periphery of the bowl, whereit 'rises-out side of the cover-plate between this and the cover and thus reaches the outlet 11, while the separated cream as the lighter element is driven inward to the shaft, where it-rises slick and aeelumilate on'the edge of the to be choked by accumulated cream. And

when the separation is done. and the bowl opened and the liner removed the ribs will The vertical channels formed on the ribs will thus remainopen and are not liable he found clean or nearly so andnot covered with an adherel'it, layer of cream as in some 01. the constructions used heretofore.

What I claim as new and desire to secure .by Letters Patent is:

In a centrifugal separator the combination of a tubular feeding shaft, a plurality of ribs axially ihsposed on the circumference of the shaft, the ribs being provided with grooves opening in radial direction on the entire lengtl't thereof, a plurality of conical superposed plates provided with slots, and being disposed so thatthe slots 

